How to modify this page?Step 1: Go to Content -> Article Manager.Step 2: Find and edit the "Error 404" article.

How is the search module displayed? It is displayed using the "Content - Load Modules" plugin. It allows to display a module in a Joomla article.The module is published on the following position: error404-search

How to display a different article as custom 404 page?If you want to display other article, you need to change the article ID in the following location: /templates/jm-template/error.php